Barsine sublucana Volynkin & Černý, 2017

Volynkin, Anton V. & Černý, Karel, 2017, On the taxonomy of the Barsine delineata species-complex (Lepidoptera, Erebidae, Arctiinae), Zootaxa 4258 (2), pp. 138-144 : 142-143

Barsine sublucana Volynkin & Černý , sp. nov.

( Figs 7, 8 , 11, 12 , 15 )

Type material. Holotype ( Figs 7 , 11 ): male, 14–22.VIII.2016, N Thailand, Chiang Mai prov., Thong Chai Range, near Doi Suthep-Pui National Park , 18°54'10.50''N 98°51'46.05''E, h= 700 m, secondary forest, Volynkin A.V. & Ivanova M.S. leg., slide AV 2361m Volynkin (Coll. NHM, ex coll. CAV) . Paratypes: 1 male, 3 females, same data as in the holotype (Coll. CAV), slides AV 2355m Volynkin (male), AV2356f Volynkin (female) ; 1 female, N. Thailand, Chiang Rai, 1090 m, road 1150, km 17 from Wiang Pa Pao , 19°18'45" N, 99°23'24" E, 27.V.2011 leg. K. Černý (Coll. CKC) ; 6 males, 9 females, same data, but reared ex ovo, cult. K. Černý (Coll. CKC).

Diagnosis. Externally, the new species ( Figs 7, 8 ) differs from its closest relative B. delineata ( Figs 1–6 ) by its slightly narrower forewings, intense pale red ground color of fore- and hindwings, and more distinct forewing pattern. The male genitalia ( Figs 11, 12 ) differ clearly from those of B. delineata ( Figs 9–10 ) by the smaller juxta, narrower valvae, broad lobe-like medial costal extension, much smaller and almost triangular distal costal extension, distally broader and strongly setose sacculus, longer and stronger curved distal saccular extension, and shorter dorsal finger-like diverticulum in the vesica. The female genitalia ( Fig. 15 ) are close to those of B. delineata ( Figs 13, 14 ), but differ by the much shorter and narrower postvaginal plate, slightly narrower antrum, anteriorly broader ductus bursae, and larger spinules in corpus bursae.

Description. Adult ( Figs 7, 8 ). Length of forewing 12–13 mm in males and 14–15 mm in females. Antennae of both sexes finely ciliate, with longer cilia in males. Sexual dimorphism poorly expressed: male have only somewhat narrower forewings and slightly smaller size than females. Head, thorax and abdomen intensely pale red; thorax with two black dots medially. Forewing ground color intensely pale red, pattern sharp, consisting of black lines, strokes and dots. Subbasal area with a black dot and short longitudinal stroke; antemedial line wshaped; medial line slightly curved inwards; cell with a small black dot; postmedial line strongly curved outwards, connected with strokes of different length situated on veins in subterminal area; subterminal and apical sections of costal margin black; cilia black. Hindwing pale red, paler than forewing; veins Rs and M1 with strong black suffusion; cilia pale red, but black on apex. Male genita lia ( Figs 11, 12 ). Uncus long, narrow, curved, laterally flattened, apically pointed. Tegumen short and moderately broad; manica broad, with strong scobination; juxta small, consists of two triangular lobes; vinculum short, U-shaped. Valva elongated, distally broadened; medial costal extension long and broad lobe; distal costal extension very large, broadly triangular, with an additional short, broad and apically rounded dorsal protrusion; sacculus large, broad, its dorsal margin strongly setose; distal saccular extension short, slightly curved dorsally. Aedeagus narrow, elongated; vesica consists of one large dorsal conical diverticulum and bulbous latero-ventral diverticulum, both with field of small narrow cornuti, and also one dorsal subbasal and two small medio-ventral membranous diverticuli; basal plate of ductus ejaculatorius heavily sclerotized, narrow and very long. Female genitalia ( Fig. 15 ). Ovipositor short and broad. Apophyses anteriores and posteriores long and thin. Postvaginal plate short and narrow. Antrum broad, funnel-like; ductus bursae short, moderately sclerotized, dorso-ventrally flattened, strongly broadened posteriorly. Corpus bursae ovate, with numerous small spinules which are larger in posterior section of corpus bursae. Appendix bursae small, conical, situated postero-laterally.

Distribution. The new species is known from North Thailand (Chiang Mai and Chiang Rai provinces).

Etymology. 'Sublucana' is 'predawn' in Latin. The species name refers to the behavior of males that fly only before sunrise.

Note. Previously the taxon was reported for Thailand by Černý (2012) as B. delineata .

Figures

FIGURES 1 – 8. Barsine spp.: adults. 1, B. delineata, holotype female, China, Shanghai (© NHM); 2, B. delineata, holotype of Ammatho figuratus, female, N China (© NHM); 3, B. delineata, holotype of Cyme chinensis, female, [China] (© NHM); 4, B. delineata, male, SW China, [Sichuan prov.] (© NHM); 5, B. delineata, holotype of Ammatho fuscescens, male, China, [vic. of Beijing] (© NHM); 6, B. delineata, holotype of Miltochrista dimidiata, male, China, Hunan province, Hendong (IZCAS) (Photo by Wu Chunsheng); 7, B. sublucana sp. n., holotype male, N Thailand, Chiang Mai prov. (NHM); 8, B. sublucana sp. n., paratype female, N Thailand, Chiang Mai prov. (CAV).

FIGURES 9 – 12. Barsine spp.: male genitalia. 9, B. delineata, China, Zhejiang province, West Tien-mu-shan, slide AV 1892 m Volynkin; 10, B. delineata ' f. fuscescens ', China, Guangdong province, slide AV 1930 m Volynkin; 11, B. sublucana sp. n., holotype, N Thailand, Chiang Mai prov., slide AV 2361 m Volynkin; 12, B. sublucana sp. n., paratype, N Thailand, Chiang Mai prov., slide AV 2355 m Volynkin.

FIGURES 13 – 15. Barsine spp.: female genitalia. 12, B. delineata, China, Zhejiang province, slide BMNH (E) Arct- 6478 f Volynkin (© NHM); 14, B. delineata ' f. fuscescens ', China, Shanghai, slide BMNH (E) Arct- 6480 f Volynkin (© NHM); 15, B. sublucana sp. n., paratype, N Thailand, Chiang Mai prov., slide AV 2356 f Volynkin.